Unformatted text preview: bond = The energy for anabolic reactions may be obtained by hydrolysis of ATP to ADP + phosphate. The metabolic reactions of living systems are catalyzed by enzymes- By a catalyst, we we mean something that increases the frequency of productive collisions in a chemical reaction- Enzymes, most of which are large globular protein molecules, are highly specific, affecting only certain substrates and certain chemical reactions- Many enzymes consist of both a protein portion, the apoenzyme, and a nonprotein cofactor; together, these make up a holoenzyme (Tortora et al., Figure 5.2) = If the cofactor is an organic molecule, it is called a coenzyme; most of the compounds that we refer to as "vitamins" act as coenzymes or components of coenzymes...
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- Fall '09
- Enzymes, Anabolic reactions, Catabolic reactions